A Saturday report in The New York Times revealed that a top FBI agent involved in its Russia investigation sent text messages last year that appeared to criticize then-candidate Donald Trump, prompting President Trump and his supporters to publicly accuse the FBI of having a bias against him this weekend, a charge that former attorney general and deputy attorney generals under President Barack Obama strongly rejected.

All of this left the FBI in an uncomfortable national spotlight once again.

Special counsel Robert S. Mueller III removed the agent, Peter Strzok, from the Russia probe over the summer when a Department of Justice inspector general raised questions about those text messages, The Times reported. Strzok was reassigned to another department.

It’s unclear exactly what Strzok had said about Trump, but The Washington Post reported that he and an FBI lawyer, Lisa Page, exchanged text messages that expressed views seen as more critical of Trump and more favorable to Hillary Clinton during last year’s election season.

“Now it all starts to make sense!” Trump tweeted Sunday, renewing his skepticism about the way the FBI and then-director James Comey handled an investigation into Clinton’s use of a private email server.

Let’s break it down.

Who is Peter Strzok?

Strzok was described as “one of the most experienced and trusted FBI counterintelligence investigators” who, as The Times reported, was was at the heart of the FBI’s investigation into Clinton’s handling of classified information using a private email server.

Strzok was later assigned to Mueller’s team to look into Russia’s interference in the 2016 election and whether Russians coordinated those efforts with the Trump campaign.

Who is Lisa Page?

Page was an FBI lawyer who worked with Andrew McCabe, then-deputy director at the FBI, The Post reported, adding that the two were in communication at the time because they were having an extramarital affair with each other.

What did their text messages say?

It has not been publicly revealed what was said in the text messages between Page and Strzok, but the messages included their reactions to “news of the moment” during the election season.

How did those text messages emerge?

Questions about the text messages came up in an inquiry that the Department of Justice’s inspector general launched in January into whether the FBI followed policies in its investigations into Clinton.

Why does it look bad for the FBI?

Revelations about Strzok’s text messages — and his subsequent removal over the summer — came a day after retired Lt. Gen. Michael Flynn, a former Trump adviser, pleaded guilty to lying to the FBI.

The pressure is on Mueller and the FBI to maintain credibility in the investigation given that Trump himself has undermined it as a “witch hunt” and has continued to deny that there was ever collusion between his campaign and Russian agents.

Even on Sunday, Trump accused former FBI director Comey of ruining the agency’s reputation.

Is there an anti-Trump bias at the FBI?

The revelation has provoked even stronger pushback against the FBI, this time now including a Republican Congressman from Florida who is calling the text messages as “evidence” of anti-Trump bias.

“We continue to see more pockets of evidence that there is an anti-Trump bias at the FBI and there’s a pro-Hillary Clinton bias,” Gaetz said. “We have to wonder why he was on this investigation in the first place.”

Ari Fleischer, a former White House spokesperson for George W. Bush, said the public should see the content of those text messages and what that could mean for the Russia investigation.

Others reiterated the dangers of undermining the FBI and its Russia investigation. Former U.S. Attorney General Eric Holder and others criticized Trump’s accusation that the FBI’s reputation is in “tatters.”

Defending the FBI, Comey tweeted a quote from remarks he gave at a Congressional hearing in June: “I want the American people to know this truth: The FBI is honest. The FBI is strong. And the FBI is, and always will be, independent.”

What do you think — is the FBI honest and independent as Comey says or is there anti-Trump bias as Trump says?